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"Google Correlate finds search patterns which correspond with real-world trends. Compare time series Many search terms vary in popularity over time. To find terms that vary in a similar way to your own time series, enter your data using the link above. Or take a look at these examples to see which search terms: "

A beautifully made search engine for old maps. A great resource for history and geography projects. Just scroll or search the location and choose the map you wish to view